examples/pytholite: add uio example

examples/pytholite/uio.py

@@ -0,0 +1,65 @@
+from migen.flow.network import *
+from migen.actorlib.sim import *
+from migen.bus import wishbone
+from migen.bus.transactions import *
+from migen.uio.ioo import UnifiedIOSimulation
+from migen.pytholite.transel import Register
+from migen.pytholite.compiler import make_pytholite
+from migen.sim.generic import Simulator
+from migen.sim.icarus import Runner
+from migen.fhdl import verilog
+
+layout = [("r", BV(32))]
+
+def gen():
+	ds = Register(32)
+	for i in range(10):
+		r = TRead(i)
+		yield r
+		ds.store = r.data
+		yield Token("result", {"r": int(ds)})
+
+class Dumper(SimActor):
+	def __init__(self):
+		def dumper_gen():
+			while True:
+				t = Token("result")
+				yield t
+				print(t.value["r"])
+		super().__init__(dumper_gen(),
+			("result", Sink, layout))
+
+class SlaveModel(wishbone.TargetModel):
+	def read(self, address):
+		return address + 4
+
+def run_sim(ng):
+	g = DataFlowGraph()
+	d = Dumper()
+	g.add_connection(ActorNode(ng), ActorNode(d))
+	
+	slave = wishbone.Target(SlaveModel())
+	intercon = wishbone.InterconnectPointToPoint(ng.buses["wb"], slave.bus)
+	
+	c = CompositeActor(g)
+	fragment = slave.get_fragment() + intercon.get_fragment() + c.get_fragment()
+	
+	sim = Simulator(fragment, Runner())
+	sim.run(30)
+	del sim
+
+def main():
+	print("Simulating native Python:")
+	ng_native = UnifiedIOSimulation(gen(), 
+		dataflow=[("result", Source, layout)],
+		buses={"wb": wishbone.Interface()})
+	run_sim(ng_native)
+	
+	#print("Simulating Pytholite:")
+	#ng_pytholite = make_pytholite(gen, dataflow=[("result", Source, layout)])
+	#run_sim(ng_pytholite)
+	
+	#print("Converting Pytholite to Verilog:")
+	#print(verilog.convert(ng_pytholite.get_fragment()))
+
+main()